The North American release of Killer is Dead: Nightmare Edition is delayed by two weeks for Steam, with the game's launch being pushed to May 23, it was announced on the game's official Steam page.
Earlier in the year, a Deep Silver representative confirmed to Polygon the game would see a digital release on May 9 for $19.99. This follows an announcement from developer Grasshopper Manufacture stating Nightmare Edition would be ported to Windows PC and released to both Europe and the U.K. on May 9.
The original game launched on PlayStation 3 and Xbox 360 in August 2013. The PC port is being developed by Kadokawa Games, which published the console release in Japan.
Known as the Nightmare Edition, the PC version will include some new content and features over the existing game. On the new Nightmare Mode difficulty level, players will only have three options to kill enemies: headshots, Adrenaline Burst and Dodge Burst. The Nightmare Edition will also come with the Smooth Operator Pack, which was available only as a pre-order bonus for the console version of the game; it will be unlocked after episode 3. And after one playthrough, the PC version will allow players to rewatch cutscenes and get more details on characters in the Theater Mode.
In the meantime, you can read our full review of the console version of Killer is Dead.